Simultaneous Transmit and Receive antennas for next-generation wireless communication applications
Simultaneous Transmit and Receive (STAR) antennas are capable of sending and receiving a signal at the same time on the same frequency and can double communication data rates in wireless point-to-point communications. However, STAR systems are subject to significant risk of self-interference, or coupling, with the transmitted signal, unintentionally disrupting the antenna’s receiver input. This technology is a full-duplex antenna technique that is capable of achieving self-interference cancellation through polarization duplexing. It offers increased isolation between the transmitter and receiver ports of the antenna across a wide array of bandwidths. The technology provides high levels of coupling mitigation for STAR antennas, with frequency and hardware flexibility, and has applications in next-generation wireless communication systems.
Polarization-based antenna provides increased isolation for full-duplex two-way wireless communications
Conventional techniques for self-interference mitigation in STAR antennas involve minimizing the inherent coupling between the antenna’s transmitter and receiver or using a controllable auxiliary path between the two ports to cancel the signal coupling. These techniques often fail to achieve the required cancellation and are not reconfigurable or scalable across a variety of frequencies. This technology utilizes orthogonal linear polarizations to increase the isolation between the transmitter and receiver and a reconfigurable reflective termination that is capable of adapting to environments with nearby signal reflectors. This technique provides more effective cancellation of undesired self-interference signals in a range of different frequencies, enabling faster wide-band data transmission.
This technology has been demonstrated to successfully provide the desired self-interference cancellation at radio frequencies (RF) and at millimeter wave frequencies.
Lead Inventor:
Applications:
- Next-generation (5G) wireless point-to-point RF/mmWave systems
- Phased array radar systems
- Military, law enforcement, and aerospace communications
- Pulse-Doppler radar systems
Advantages:
- Capable of providing high isolation between the co-located transmitter and receiver
- Can operate over a wide array of bandwidths (wide-band)
- Readily scalable to a variety of frequencies
- Implementable on both printed circuit boards and silicon at RF/mmWave frequencies
- Reconfigurable to counter environmental signal reflections
Patent Information:
Tech Ventures Reference: IR CU16025
Related Publications:
- Zhou J, Chuang TH, Dinc T, Krishnaswamy H. “Integrated Wideband Self-Interference Cancellation in the RF Domain for FDD and Full-Duplex Wireless” IEEE Journal of Solid-State Circuits. 2015 Dec 12;50(12).
- Dinc T, Chakrabarti A, Krishnaswamy H. “A 60 GHz CMOS Full-Duplex Transceiver and Link with Polarization-Based Antenna and RF Cancelation” IEEE Journal of Solid-State Circuits. 2016 May;51(5).